Lab 32.1 issue with diff

Hi,
In the lab 32.1, diff claims that the directory doesn't exist with some python related message. However it actually exists:
┌──(alu@nb)-[/tmp] └─$ ls restore/ include ┌──(alu@nb)-[~] └─$ diff -r /tmp/restore/include/ /usr/include/ diff: /tmp/restore/include/python3.11/numpy: No such file or directory
I tried the diff command with two test dirs without an issue:
┌──(alu@nb)-[/tmp] └─$ ls test1 test2 test1: sub1 test.txt test2: test.txt ┌──(alu@nb)-[/tmp] └─$ diff -r /tmp/test1 /tmp/test2 Only in /tmp/test1: sub1 diff '--color=auto' -r /tmp/test1/test.txt /tmp/test2/test.txt 1d0 < xxx
So, the diff command as such works as expected.
Where does this issue come from?
Thanks,
Urs
Answers
-
Hi Urs,
I checked on the labs file and Lab 32.1 is about another thing. Are you sure about the chapter and section?
Regards,
Luis.0 -
Hi Luis,
Yes, it's about backup and restore with tar. At the very end of Lab 32.1, step 4:
"4. Compare the contents with the original directory the archive was made from."diff is used to compare the contents of the original /usr/includes directory, with the restored one. The solution suggests:
$ diff -qr include /usr/includeRegards,
Urs0 -
@albiurs said:
Hi Luis,Yes, it's about backup and restore with tar. At the very end of Lab 32.1, step 4:
"4. Compare the contents with the original directory the archive was made from."diff is used to compare the contents of the original /usr/includes directory, with the restored one. The solution suggests:
$ diff -qr include /usr/includeRegards,
Urs...This is the Link to the Lab:
https://trainingportal.linuxfoundation.org/learn/course/linux-system-administration-essentials-lfs207/backup-and-recovery-methods/lab-exercises?page=10 -
Hi Urs,
I got it. So, I went over Lab 32.1 on Ubuntu 24.04 and it worked fine for me. The diff tool didn't report any issue and the output for the command was empty, as expected:
ubuntu@master:/tmp/backup/restore/usr$ diff -qr include/ /usr/include/
ubuntu@master:/tmp/backup/restore/usr$Per the man page, the 'q' parameter reports only when files differ. And 'r' is for 'recursive'.
What OS and version are you using?
Regards,
Luis.0 -
Hi Luis,
I'm on Debian 12:
┌──(alu@nb)-[~] └─$ cat /etc/os-release PRETTY_NAME="Debian GNU/Linux 12 (bookworm)" NAME="Debian GNU/Linux" VERSION_ID="12" VERSION="12 (bookworm)" VERSION_CODENAME=bookworm ID=debian HOME_URL="https://www.debian.org/" SUPPORT_URL="https://www.debian.org/support" BUG_REPORT_URL="https://bugs.debian.org/" ┌──(alu@nb)-[~] └─$ uname -a Linux nb 6.1.0-27-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1 (2024-11-01) x86_64 GNU/Linux
I just tried it again with the same python error on this system. But now I also tried it on a Ubuntu VM where I don't get this error too. So I think it must be an issue of my Debian machine...
By the way what means:
#1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1
?Thanks,
Urs0 -
Hi Urs,
I just tried it again with the same python error on this system. But now I also tried it on a Ubuntu VM >where I don't get this error too. So I think it must be an issue of my Debian machine...
Yep, it seems to be related to that system or that OS/version in particular.
By the way what means:
1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1?
It indicates that the kernel has support for SMP dynamic preemption.
Regards,
Luis.0
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